diff --git a/docs/conf.py b/docs/conf.py
index a513882a..0a92ba7c 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -26,7 +26,8 @@ import mopidy
 # Add any Sphinx extension module names here, as strings. They can be extensions
 # coming with Sphinx (named 'sphinx.ext.*') or your custom ones.
 extensions = ['sphinx.ext.autodoc', 'autodoc_private_members',
-    'sphinx.ext.graphviz', 'sphinx.ext.inheritance_diagram']
+    'sphinx.ext.graphviz', 'sphinx.ext.inheritance_diagram',
+    'sphinx.ext.viewcode']
 
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ['_templates']